ARDEX's FEATHER FINISH XF Self-Drying Underlayment provides a smooth surface over a variety of substrates prior to the installation of floor coverings, including sheet vinyl and VCT. This underlayment sets itself apart with its extended flow (XF) properties, which enable it to spread more easily and cover larger areas with minimal effort. Its self-leveling characteristics ensure a seamless finish over various substrates, including concrete, wood, and existing tile.